simplify up equals and hashCode
simplify up equals and hashCode

zofuthan/kilim,zofuthan/kilim,KobeFeng/kilim,ericmm/kilim,nqzero/kilim,ericmm/kilim,nqzero/kilim,KobeFeng/kilim,taowen/kilim,njucslqq/kilim,njucslqq/kilim,aruanruan/kilim,aruanruan/kilim,taowen/kilim